Day 4 2-261. Most reactive metals =

the _______ metals.

2. Most reactive nonmetals = ________.

3. Least reactive metals = ___________.

Day 3 2-25Read / Review section 6.1 AND complete #s 1-8 on page 166

Day 4 2-26How is the periodic table arranged?

Metals

Excellent conductors (Sea of electrons) even as solids

Mobile electrons

Metals are malleable and ductile

Can be pounded into sheet

Can be pulled into wire

Periodic TrendsAtomic radius:- Measure of size – radius of an atom

- Atoms with more electrons do NOT necessarily have a larger atomic radius

Periodic Trends- Atoms with more electrons do NOT necessarily have a larger atomic radius

Periodic Trends- Atoms with more electrons do NOT necessarily have a larger atomic radius

1. Atoms get larger going down a group.

2. Atoms get smaller going across a period

So why?...

Periodic Trends- Atoms with more electrons do NOT necessarily have a larger atomic radius

As you move down a group you increase the number of energy levels in the atom and so the atom gets larger as expected.

Periodic Trends- Atoms with more electrons do NOT necessarily have a larger atomic radius

As you move across a period, # of protons increases and outermost energy level stays the same, the attractive force between elecs. and pros. pulls the atom tighter (closer to nucleus)

Periodic TrendsWhat’s bigger:

B or Al

B or N

N or Zn

C or Cl

Read / review Section 6.2 and

complete #s 11-17 on page 173

Day 5 2-271. Why does the size of an atom

decrease moving across a period?

2. What is more reactive Cl or Ar – Explain!!!

Red = ?Green = ?

Blue = ?

Good Conductors = ?

Inert elements = ?

Review1. What element is in Group 2,

Period 3?

2. Name an element in Group 3

3. How many valence electrons in Xe?

4. Give me an element with 1 valence electron.

Partner Review1. What element is in Group 17,

Period 3?

2. What family of elements is the element above in?

3. How many valence electrons does it have?

Periodic TrendsWhat are ions?

- atoms that are charged due to the loss or gain of

electrons

- If an atom loses elecs. it becomes smaller and positive

- If an atom gains elecs. it becomes larger and negative

Notes page 4

Periodic TrendsWhat are ions?

- If an atom loses elecs. it becomes smaller

- If an atom gains elecs. it becomes larger

PAGE 176-179Which elements gain elecs.? Which elements lose elecs.? Pattern?

Periodic TrendsElements on the right side of the periodic table form _________ ions

Elements in the same group form ___________ ions

negative

The same

Periodic TrendsWhat’s bigger:

F or F-

Na or Na+

Na or Rb

Na of Al

F or Cl-

Octet rule – Atoms tend to gain, lose, or share electrons in order to acquire a full set of valence electrons (8)

- 2 for H, He, Li, Be, + B

notes page 6